Around 10 p.m. four others were shot in a parking lot in the 4100 block of West Roosevelt Road after a black car pulled up and opened fire. According to the Chicago Tribune, a 29-year-old man and a 27-year-old man were shot in the leg, another 29-year-old man was shot in the arm, and a 36-year-old man was shot in the thigh, said police. The four were taken to Mount Sinai Hospital.

A 31-year-old man also was shot and killed across the street from his home on 113th Place between State Street and South Michigan Avenue. The man, David Gully, was pronounced dead at Roseland Hospital around 5 p.m.

Another act of violence occurred when a 24-year-old man was shot in the buttocks around 5 p.m. in the 11800 block of South Ashland Avenue on the Far South Side, police said. The man had been walking down the street when two people approached him and opened fire. He was later transported to Advocate Christ Medical Center and in stable condition.

A man in his 30s was shot around 10:15 p.m. in the 13100 block of South Ellis Avenue and suffered from injuries after being shot in the leg. He was taken to Metro South Medical Center in Blue Island.

The violent acts all occurred within a six-hour period.

Chicago police Supt. Garry McCarthy on Friday said the incidents were gang-related. In moves that shake up police leadership, he said his officers and their superiors must focus their attention on "getting inside these gang conflicts."